CN110219742B - Vehicle power adjusting method - Google Patents
Vehicle power adjusting method Download PDFInfo
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- CN110219742B CN110219742B CN201910408620.1A CN201910408620A CN110219742B CN 110219742 B CN110219742 B CN 110219742B CN 201910408620 A CN201910408620 A CN 201910408620A CN 110219742 B CN110219742 B CN 110219742B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D41/1406—Introducing closed-loop corrections characterised by the control or regulation method with use of a optimisation method, e.g. iteration
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
- G07C1/10—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people together with the recording, indicating or registering of other data, e.g. of signs of identity
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Abstract
A vehicle power tuning method comprising: acquiring the ecu data from the vehicle ecu and storing the ecu data as an ecu data file; finding a first address and data corresponding to the first address from an eco data file; respectively carrying out high-low bit interchange on the first 2 bytes and the last 2 bytes of the data to obtain an address calculation parameter a and a parameter b; obtaining a second address through a formula, calculating the data storage length of each datum of the smoke intensity limiting coefficient MAP, obtaining the data storage addresses of all the data of the smoke intensity limiting coefficient MAP, and obtaining the data of each smoke intensity limiting coefficient MAP according to each data storage address; respectively processing x-axis coordinate data and y-axis coordinate data of each smoke intensity limiting coefficient MAP graph data, and replacing original data in the ecu data file after processing to generate a new ecu data file; writing a new ecu data file to the vehicle ecu. The invention can carry out automatic adjustment with high efficiency.
Description
Technical Field
The invention relates to the technical field of vehicle diagnosis, in particular to a vehicle power adjusting method.
Background
Typically, a user will find the vehicle power insufficient after using the vehicle for a period of time, and power calibration is required.
The operation of modern automobile engine is controlled by automobile computer (i.e. ECU), and ECU controls the air input, oil injection quantity, ignition time, etc. of engine, so as to determine the performance of engine operation efficiency, power, torsion, etc. Information such as intake air quantity, fuel injection quantity, ignition time and the like corresponding to the engine working under various conditions such as rotating speed, gear, load, temperature and the like is recorded in the ECU in a MAP mode. The essence of the power adjustment is to optimize and modify the MAP graph based on the actual working condition tolerance and experimental data of a specific engine. Namely, the data for controlling the engine is changed, so that the operation of the engine is optimized, and the aims of enhancing the cold starting speed of the engine and reducing the fuel consumption are fulfilled.
In the conventional calibration method, the MAP is modified manually, and an operator needs to have abundant experience to judge the MAP type and modify the data in the MAP according to the experience. This approach is inefficient, the entire operation is completely empirical, and repeatability is nearly nil.
Disclosure of Invention
In view of the above, a method for adjusting vehicle power is provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
a vehicle power tuning method comprising:
acquiring the ecu data from the vehicle ecu and storing the ecu data as an ecu data file;
finding a first address and data corresponding to the first address from the eco data file, wherein the data are 8 bits and have 4 bytes in total;
respectively exchanging high and low bits of the first 2 bytes and the second 2 bytes of the data to obtain an address calculation parameter a and a parameter b;
obtaining a second address through a formula first address + (a + b) × 2+4, wherein the second address is a data storage initial address of the smoke intensity limiting coefficient MAP graph data, calculating the data storage length of each datum of the smoke intensity limiting coefficient MAP graph through a × b × 2, obtaining the data storage addresses of all the data of the smoke intensity limiting coefficient MAP graph according to the data storage length, and further obtaining the smoke intensity limiting coefficient MAP graph data according to the data storage addresses, wherein the smoke intensity limiting coefficient MAP graph data are 8 bits and total 4 bytes, the first 2 bytes are x-axis coordinate data, and the last 2 bytes are y-axis coordinate data;
respectively processing the x-axis coordinate data and the y-axis coordinate data of each smoke limit coefficient MAP graph data, and replacing the original data in the ecu data file after processing to generate a new ecu data file:
respectively performing high-low bit interchange on two bytes of x-axis coordinate data and two bytes of y-axis coordinate data, converting the two bytes into a 10-system, multiplying the 10-system by a user selection coefficient, and converting the integer into a 16-system, wherein the user selection coefficient is 0.75-1;
respectively carrying out high-low bit interchange on the two bytes of the converted x-axis coordinate data and the two bytes of the converted y-axis coordinate data;
replacing the original x-axis coordinate data and y-axis coordinate data with the high-low position interchanged x-axis coordinate data and y-axis coordinate data;
writing a new ecu data file to the vehicle ecu.
Acquiring the ecus data from a vehicle diagnosis OBD port through a VCI communication module by vehicle diagnosis equipment, storing the ecus data as an ecus data file in the vehicle diagnosis equipment, connecting the vehicle diagnosis equipment with the VCI communication module in a wired or wireless manner, and connecting the VCI communication module with the vehicle diagnosis OBD port.
The vehicle diagnostic apparatus provides a graphical interface for a user to select the user selection factor.
The user selection factor is 0.8 or 0.9.
The invention can efficiently and automatically adjust and calibrate, thereby achieving the aims of enhancing the cold start speed of the engine and reducing the fuel consumption.
Drawings
The invention is described in detail below with reference to the following figures and detailed description:
fig. 1 is a schematic diagram of the present invention.
Detailed Description
A vehicle power tuning method comprising:
first, the ecu data is acquired from the vehicle ecu and saved as an ecu data file.
And secondly, finding a first address and data corresponding to the first address from the ecu data file, wherein the data are 8 bits and have 4 bytes in total.
When the vehicle eco software version is known, the first address is also known and stored in the database, and the first address and the data corresponding to the first address can be found from the eco data file by matching the address of the data in the eco data file with the address stored in the database.
The data corresponding to the first address is used for calculating the position of the default MAP which needs to be modified, so that the manual judgment of the type of the MAP is avoided.
And thirdly, respectively exchanging high and low bits of the first 2 bytes and the second 2 bytes of the data to obtain an address calculation parameter a and a parameter b.
Fourthly, through a formula: the first address + (a + b) × 2+4 (when the ECU software generates the MAP, the relation between the first address and the second address is determined) obtains the second address, the second address is the data storage first address of the data of the smoke intensity limiting coefficient MAP, the data storage length of each data of the smoke intensity limiting coefficient MAP is calculated through a b 2, the data storage addresses of all the data of the smoke intensity limiting coefficient MAP are obtained according to the data storage lengths, and then the data of each smoke intensity limiting coefficient MAP are obtained according to each data storage address.
Taking P949V732 software as an example: if the first address is 06F74C and the corresponding data is 0E000F00, the address calculation parameters a and b are 000E and 000F, respectively. The second address is 0x06F74C + (14+15) × 2 ═ 0x06F78A, and the number of bytes (data storage length) of the MAP region is 14 × 15 × 2 ═ 420 ═ 0x1a 4.
The smoke intensity limiting coefficient MAP graph data are 8 bits and total 4 bytes, the first 2 bytes are x-axis coordinate data, the second 2 bytes are y-axis coordinate data, the x-axis coordinate and the y-axis coordinate can be obtained after high-low bit interchange is respectively carried out on the first 2 bytes and the second 2 bytes (the interchange mode is the same as the third step), the x-axis coordinate is an engine rotating speed value, and the y-axis coordinate is a smoke intensity limiting value lambda of air mass ratio per cycle.
The smoke limit can be adjusted in the vehicle parameters (balance between dynamic performance and smoke index), the limit is limited in a mode of influencing an excess air coefficient, the limit is too tight, and low-speed external characteristic torque can be influenced, so that the problem of poor dynamic performance is reflected in the vehicle starting and gear shifting process.
Fifthly, processing the x-axis coordinate data and the y-axis coordinate data of the MAP data of each smoke limit coefficient respectively, replacing the original data in the ecu data file after processing, and generating a new ecu data file:
A. and (4) respectively performing high-low bit interchange (the interchange mode is the same as the step three) on two bytes of the x-axis coordinate data and two bytes of the y-axis coordinate data, converting the two bytes into a 10-system, then multiplying the 10-system by a user selection coefficient, and converting the integer into a 16-system, wherein the user selection coefficient is 0.75-1.
If the x-axis coordinate data is 000C, high and low bits of 0C00 are interchanged to obtain 000C, then the 000C is converted into a 10-system, multiplied by a user selection coefficient, and rounded to be converted into a 16-system.
B. And respectively carrying out high-low bit interchange on the two bytes of the converted x-axis coordinate data and the two bytes of the converted y-axis coordinate data.
C. And replacing the original x-axis coordinate data and y-axis coordinate data with the exchanged high and low positions of the x-axis coordinate data and the y-axis coordinate data.
And sixthly, writing the new ecu data file into the vehicle ecu, and completing calibration.
The invention can efficiently and automatically adjust and calibrate, thereby achieving the aims of enhancing the cold start speed of the engine and reducing the fuel consumption.
In the present embodiment, as shown in fig. 1, the vehicular diagnostic apparatus 11 acquires the ecu data from the vehicular ecu14 from the vehicular diagnostic OBD port 13 through the VCI communication module 12 and stores the ecu data as an ecu data file in the vehicular diagnostic apparatus 11, the vehicular diagnostic apparatus 11 is connected to the VCI communication module 12 by wire or wirelessly, and the VCI communication module 12 is connected to the vehicular diagnostic OBD port 13.
The vehicle diagnosis device provides a graphical interface for a user to select the user selection coefficient.
Preferably, the user selection coefficient is 0.8 or 0.9, through experiments, the cold start speed of the engine can be improved by 15-25% and the fuel consumption can be reduced by 15% through adjustment under the condition that the user selection coefficient is 0.8, and the cold start speed of the engine can be improved by 3-10% and the fuel consumption can be reduced by 5% through adjustment under the condition that the user selection coefficient is 0.9.
However, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present invention, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims, provided they fall within the true spirit of the present invention.
Claims (4)
1. A vehicle power tuning method, comprising:
acquiring the ecu data from the vehicle ecu and storing the ecu data as an ecu data file;
finding a first address and data corresponding to the first address from the eco data file, wherein the data are 8 bits and have 4 bytes in total;
performing high-low bit interchange on the first 2 bytes of the data to obtain an address calculation parameter a, and performing high-low bit interchange on the last 2 bytes of the data to obtain an address calculation parameter b;
obtaining a second address through a formula first address + (a + b) × 2+4, wherein the second address is a data storage initial address of the smoke intensity limiting coefficient MAP graph data, calculating the data storage length of each datum of the smoke intensity limiting coefficient MAP graph through a × b × 2, obtaining the data storage addresses of all the data of the smoke intensity limiting coefficient MAP graph according to the data storage length, and further obtaining the smoke intensity limiting coefficient MAP graph data according to the data storage addresses, wherein the smoke intensity limiting coefficient MAP graph data are 8 bits and total 4 bytes, the first 2 bytes are x-axis coordinate data, and the last 2 bytes are y-axis coordinate data;
respectively processing the x-axis coordinate data and the y-axis coordinate data of each smoke limit coefficient MAP graph data, and replacing the original data in the ecu data file after processing to generate a new ecu data file:
respectively performing high-low bit interchange on two bytes of x-axis coordinate data and two bytes of y-axis coordinate data, converting the two bytes into a 10-system, multiplying the 10-system by a user selection coefficient, and converting the integer into a 16-system, wherein the user selection coefficient is 0.75-1;
respectively carrying out high-low bit interchange on the two bytes of the converted x-axis coordinate data and the two bytes of the converted y-axis coordinate data;
replacing the original x-axis coordinate data and y-axis coordinate data with the high-low position interchanged x-axis coordinate data and y-axis coordinate data;
writing a new ecu data file to the vehicle ecu.
2. The vehicle power tuning method as claimed in claim 1, wherein a vehicle diagnostic device obtains the ecus data from a vehicle diagnostic OBD port through a VCI communication module and stores the ecus data as an ecus data file in the vehicle diagnostic device, the vehicle diagnostic device is connected with the VCI communication module in a wired or wireless manner, and the VCI communication module is connected with the vehicle diagnostic OBD port.
3. A vehicle power tuning method as claimed in claim 2, wherein the vehicle diagnostic device provides a graphical interface for a user to select the user selection factor.
4. A vehicle power tuning method according to claim 1 or 3, characterized in that the user selection factor is 0.8 or 0.9.
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| CN201910408620.1A CN110219742B (en) | 2019-05-16 | 2019-05-16 | Vehicle power adjusting method |
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| CN201910408620.1A CN110219742B (en) | 2019-05-16 | 2019-05-16 | Vehicle power adjusting method |
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| CN110219742B true CN110219742B (en) | 2020-11-27 |
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| JP2004220519A (en) * | 2003-01-17 | 2004-08-05 | Denso Corp | Electronic device and data rewriting method in electronic device |
| JP4179350B2 (en) * | 2006-06-26 | 2008-11-12 | トヨタ自動車株式会社 | Vehicle control device |
| US8898620B2 (en) * | 2007-07-09 | 2014-11-25 | Nolio Ltd. | System and method for application process automation over a computer network |
| CN104598286B (en) * | 2015-02-26 | 2018-09-11 | 广东欧珀移动通信有限公司 | The Oftware updating method and device of mobile terminal |
| CN106874055B (en) * | 2017-03-07 | 2020-01-31 | 上海怿星电子科技有限公司 | method and device for automatic flash test of automobile ECU program |
| WO2019021064A1 (en) * | 2017-07-25 | 2019-01-31 | Aurora Labs Ltd | Constructing software delta updates for vehicle ecu software and abnormality detection based on toolchain |
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